I'm interested to see the development of enhanced geothermal systems (EGS), a technology similar to fracking in that it requires injecting water into rock. My true concerns regarding geothermal power come from this similarity between geothermal and fracking. Therefore I'd like to see more studies into how the use of geothermal power may or may not result in an increased number of earthquakes or even upgrade the risk for contamination of the water supply. If these issues can be dealt with concretely or proven to be overblown, geothermal heat could have a place among the country's future energy mix. That would be great for industry giant Ormat Technologies (NYSE:ORA), which has geothermal projects in Nevada, Hawaii, California, and recently received big supply contracts in Indonesia.